Nut-lock



(No Model.)

J. O. ORUM. NUT LOGK.

No. 543,176 Patented July 23, 1895.

Fries,

ATENT JAMES C. CRUM, OF LADIESBURG, MARYLAND.

NUT-LOCK.

EQFECIFICATION forming part of Letters Patent No. 543,176, dated July 23, 1895.

\ Application filed J' anuary 24 1896. Serial No. 536,098. (No model) To all whom it may concern.-

Be it known that I, JAMEs G. CRUM, a citizen of the United States, residing at Ladiesburg, in the county of Frederick and State of Maryland, have invented certain new and useful Improvements in Nut-Locks; and Ido is securely held to the washer by means of a key, the washer being prevented from rotating by means of an integral lug, which is designed to engage in a perforation in the object to which it is applied.

A further object of the invention is to construct a washer carrying on one side an integral lug, and the said washer having a plurality of perforations which are spirally inclined and terminating on one side of the washer in recesses about the periphery thereof, which perforations are adapted to receive a curved wrought-iron pin, which is inserted into the washer after the nut has been screwed home, the key or pin being placed in the aperture which would come nearest to a corner of the nut and be in the path of the latterv when the nut is unscrewed or loosened, by which arrangement of locking means there will be sixteen diderent positions in one revolution of the ordinary quadrangular nut at which it will be possible to insert the key, made preferably of wrought-iron, and which, after being inserted in an aperture of the washer, may be bent up over the edge of the washer, presenting the head of the said key of reference marked thereon, form a part of this specification, and in which drawings similar letters of reference indicate like parts or other member through which the bolt B passes.

C is a washer having a perforation c, which is adapted to register with a perforation d in the beam or other member to which the bolt is applied.

D is a washer having an integral lug D, which, when the said washer D is placed on the shank of the bolt, is designed to engage in the apertures c and d to prevent the Washers from turning. The said washer D has preferably four perforations E, located as seen in the drawings, and the path of each aperture or perforation is slightly spiral and terminates in a recess a openingon the reverse side, and which extends outwardly to the periphery of the washer.

F is a curved pin or key, made preferably of wrought-iron, and after the nut G is screwed home on the threads of the bolt the said key or pin is inserted in the spirally-inclined aperture which comes nearest to the corner of the nut, as the nut is inclined to work loose on its threads, and it will be readily seen that by the peculiar arrangement of the apsigned to engage in apertures in the beam or stantially as shown and for the purpose set 10 plate and the Washer O, the said Washer D forth. having a plurality of spirally inclined aper- In testimony whereof I aflix my signature cures terminating in recesses about the pein presence of two witnesses.

5 riphery of the Washer, and the Wrought iron pin or key F adapted to be inserted in one of JAMES C. CRUM. the said apertures E, and present its head in lVitnesses: the path of one of the corners of the nut, as A. L. HOUGH,

it loosens from the shank of the bolt, all sub- FRANKLIN H. HOUGH. 

